39

RAM Fault (Control Card)

Danfoss · VLT 2800 Variable Speed Drive

What does 39 mean?

This alarm signals a fault in the Random Access Memory (RAM) on the control card. RAM is essential for temporary data storage during drive operation, and an error can lead to system instability, incorrect calculations, or a complete operational failure. This indicates a hardware defect on the control card.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Replace the control card, as RAM components are typically integrated and not individually replaceable.

Source: Danfoss VLT 2800 Variable Speed Drive
View Official PDF